She’s gonna have to Work B–ch if she wants to keep her man! Britney Spear’s boyfriend, David Lucado, was spotted flirting up a storm with a mystery woman while partying at Micky’s in West Hollywood on Aug. 2.

“David and this cute blonde were dancing all night,” an eyewitness tells Star. “They seemed really into each other.”

The scandalous outing comes less than two weeks after Britney posted a cute picture of herself and David on date night. But the couple — who hit a rough patch earlier this summer when the singer became too clingy — seem to be heading back into trouble.

“David had his hands all over this woman,” the spy continues. “If I were Britney, I’d be very concerned.”